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(No Model.)

'0. P. STANFORD.

QUARTZ GRUSHBR.

Patented Jan. 31.1882.

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UNrreD STATES PATENT OFFICE.

CHARLES P. STANFORD, OF SAN FRANCISCO, CALIFORNIA.

QUARTZ-CRUSHER.

SPECIFICATION forming part of Letters Patent No. 253,121, dated January3], 1882.

Application filed July 27, 1881. (No model.)

To all Awhom it may concern Be it known that I, CHARLES P. STANFORD, ofthe city and county of San Francisco, State of California, have inventedan Improved Quartz-Crusher; and I do hereby declare the following` to bea full, clear, and exact description thereof.

My invention relates to that class of mining machineryknown asquartzcrushers or mills57 and it consists in certain details of construction,as will be hereinafter described and specically claimed.

Figure l shows a front elevation of my device. Fig. 2 shows a verticalsection of the same.

A 'represents a flat-bottomed mortar secured appropriately to afoundation or mortar-block and provided with screens B. The ore is fedvto the mortar in any suitable manner. Vithin this mortar is the crusheror pestle C. This consists of a heavy metal block having peripheral diesD upon its undersurface, bolted, keyed, orotherwisetirmly secured tosaid pestle, shown here as being' keyed through projecting bosses bykeys 7c. The mortar A is large enough to easily contain the pestle andallo7 it considerable side-play.

E represents the stein or handle ofthe pestle extending upward from themortar.

F represents the frame of the device, having cross-guides G, in which avertical shaft, H, is journaled and properly supported.

has secured to it a crank-arm, I, through the outer end of which thestem or handle E loosely passes. The shaft H, being about over thecenter of the mortar, the crank I causes the stem, in order to passthrough it, to incline somewhat, and so tilt the pestle to one side, asshown iu This shaft The shaft L is journaled in the dies successively,thus producing a crushing and grinding` force, the whole weight of thepestle being thrown upon each die as it is tilted by the revolution ofthe crank, and as the faces of the dies D are made, as shown, in a planetangential to the radial line of the movement of the pestle, a series ofat surfaces ofthe dies, parallel to the ilat bottom of the mortar,intermittently strike the ore percussively. The stem, by passing`loosely through the crank, is not revolved upon its own axis, andconsequently the pestle does not turn in the mortar.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

An ore-Crusher consisting,t of the mortar A, pestle C, with itsseparated peripheral dies D,

keyed to the bosses, as shown, and stem E,

and the crank I, revolving shaft H, gears J and K, shaft L, anddriving-pulley M, substantially as herein described. Y

In witness whereof I have hereunto set my hand.

CHARLES I". STANFORD.

Witnesses :fr

S. H. NoURsE, FRANK A. BRooKs.

